In ML traditions the dictatorship of the proletariat is quite literally a dictatorship, regardless of how you want to mince words or draw questionable equivalency with your favorite modernist screed. Lenin wrote about this at length - the need to protect the revolution by any means necessary, and how civil war is good because it gives the proletariat “practice at arms.” He also put it into practice through the curtailment of civil liberties. You can also see this in the practical rejection of liberal values (eg, the curation of political agency through individual liberty) in most leftist spaces.